Jansson, Bruce S., author
Brooks/Cole; cengage learning, 2009
Buku Teks
Baugh, W.E.
MacMillan Press, 1977
Buku Teks
Routledge, 1997
Buku Teks
Brieland, Donald, author
McGraw-Hill, 1975
Buku Teks
Gore, M.S., author
Asia Publishing House, 1965
Buku Teks